一碗同等糖份的紅豆沙，如果將熱紅豆沙和凍紅豆沙比較的話，熱紅豆沙感覺起上來總是會比較甜，究竟為何會這樣呢？1582Please respect copyright.ＰＥＮＡＮＡdgYl2NUGf2
1582Please respect copyright.ＰＥＮＡＮＡI58aKfYeCn
1582Please respect copyright.ＰＥＮＡＮＡIJ7pu82wf1
答案就在於舌頭上的味蕾感測機制之上。1582Please respect copyright.ＰＥＮＡＮＡVlIZdPPFNb
1582Please respect copyright.ＰＥＮＡＮＡsYhGetKekw
（圖2）我們的舌頭上佈滿味蕾細胞，主要功能是為我們感測食物的味道。1582Please respect copyright.ＰＥＮＡＮＡ5jxK9BVGXV
以感測甜味為例，以下為扼要的簡化過程。1582Please respect copyright.ＰＥＮＡＮＡtF6uUAiHnN
1582Please respect copyright.ＰＥＮＡＮＡl1egfaZhWV
1582Please respect copyright.ＰＥＮＡＮＡheErquXuQS
1.甜味物質與味蕾上的T1R2及T1R3合併。1582Please respect copyright.ＰＥＮＡＮＡKboRCyMhZW
(Type1 Taste Receptor member 2 and 3)1582Please respect copyright.ＰＥＮＡＮＡYibApDxDtW
1582Please respect copyright.ＰＥＮＡＮＡs1nqleCvgW
2.其後觸發一系列的細胞反應，並產生出鈣離子(Ca2+ ion)。1582Please respect copyright.ＰＥＮＡＮＡ1vSLtorqif
1582Please respect copyright.ＰＥＮＡＮＡ8CBDQ9Cjkw
3. 鈣離子觸動TRPM5，產生電流。1582Please respect copyright.ＰＥＮＡＮＡkbPrqXuB5F
1582Please respect copyright.ＰＥＮＡＮＡ3Fr7nkGrEZ
4. 電流經由神經細胞傳到大腦。1582Please respect copyright.ＰＥＮＡＮＡRUDRZ5smDg
1582Please respect copyright.ＰＥＮＡＮＡv6r0nkBZ9P
5. 大腦分析電流訊息，製造甜味的感覺。1582Please respect copyright.ＰＥＮＡＮＡ8U5OGDaC2P
1582Please respect copyright.ＰＥＮＡＮＡJd9Ed4x6f2
（圖3）那麼，為何熱紅豆沙會比較甜呢？玄機就在圖中機制的第三步。1582Please respect copyright.ＰＥＮＡＮＡFU2mme6L0r
1582Please respect copyright.ＰＥＮＡＮＡAIEaHrHHvV
1582Please respect copyright.ＰＥＮＡＮＡPtdQg6jwnW
TRPM5除了能夠感測鈣離子後，亦能感測溫度。1582Please respect copyright.ＰＥＮＡＮＡXTtr0fU7dP
若然食物溫度提升的話，TRPM5所發出的電流強度便會有所增長。1582Please respect copyright.ＰＥＮＡＮＡ6pzSZ7B65f
而電流越強的話，大腦便會轉遞出越甜的感覺。1582Please respect copyright.ＰＥＮＡＮＡmIYDfVDUmi
1582Please respect copyright.ＰＥＮＡＮＡwUbIIPKp9z
而正正就是因為這個緣故，儘管糖份一樣，熱紅豆沙食起上來會比凍紅豆沙感覺起上來會比較甜。1582Please respect copyright.ＰＥＮＡＮＡk0OID10Fy9
1582Please respect copyright.ＰＥＮＡＮＡkmUY3gITPQ
1582Please respect copyright.ＰＥＮＡＮＡEas5Md1pGu
1582Please respect copyright.ＰＥＮＡＮＡqS6yXPwUs2
如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。1582Please respect copyright.ＰＥＮＡＮＡ3FjfNqku4x
1582Please respect copyright.ＰＥＮＡＮＡRasNWqPxes
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc1582Please respect copyright.ＰＥＮＡＮＡQRO4MgpCst
1582Please respect copyright.ＰＥＮＡＮＡJlJPVlJdLc
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。1582Please respect copyright.ＰＥＮＡＮＡSbSZYQseYG
1582Please respect copyright.ＰＥＮＡＮＡWtPlcqPiSe
Link:1582Please respect copyright.ＰＥＮＡＮＡyeedgC0EWG
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1582Please respect copyright.ＰＥＮＡＮＡZpUGjqun2q
1582Please respect copyright.ＰＥＮＡＮＡs8CPwlGqzy
1582Please respect copyright.ＰＥＮＡＮＡhf0nFBPlmv
有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。1582Please respect copyright.ＰＥＮＡＮＡSGwOo12ezl
Penana
search
登入arrow_drop_down
註冊arrow_drop_down
